Switch



J. E. FISHER Oct 15, 1929.

SWITCH Filed Nov. 17. 1926 2a I 21 l 20 gmmwtoc I JOSEPH E. Fla 45R Patented Oct. 15, 1929 UNITED STATES JOSEPH E. FISHER, OF HAMILTON, OHIO SWITCH Application filed November 17, 1926. Serial No. 148,863.

This invention relates to improvements in rotary switches.

An object of this invention is to provide a switch for use with radio receiving and sending apparatuses which will selectively conof antennas with the ground when the radio apparatus is not being used.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings in which:

Fig. 1 is a diagrammatic view of a radio receiving set having associated with it a switch of this invention.

Fig 2 is a plan View of the switch taken on line 22 of Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a top plan view of the stationary member of the switch taken on line 44 of Fig. 3 and looking in the direction of the single headed arrows.

have their one end secured to ring 12 and their inner end secured to the hub 13. Openings 15 are formed between successive arms 14 through which contacts 16 extend. Contacts 16 are L shaped and have a perforation 17 formed in one arm 18 thereof. The undersurface of the ring 12 is provided with notches 19 in which the arms 18 of the contacts 16 are received. The ring 12 is provided with perforations 20 in alignment with the perforations 17 formed in the arms 18 through which binding posts 21 extend. The center hub 13 in provided with a perforation 22 and a recess 23, the recess 23 being concentric with the perforation 22.

The rotary or movable member 11 is cup shaped and has a lug 24 extending inwardly from the top 25. The lug 24 is provided with a bore 26 in which is secured a pintle 27. The pintle 27 is adapted to extend through the perforation 22 formed in the center hub 13. A cotter pin 28 or the like extends through the pintle 27 and lies within the recess 23 to hold the stationary and movable members in operative relation. Interiorly of the movable member 11 a contact strip 29 is secured which strip 29 is adapted to embrace two or more of the contacts 16.

From the drawings it will be noted that the switch contains four binding posts 21 to which suitable connections are to be made. Each of the binding posts are marked, Set, 1st ant. 2nd ant. and Gnd. A suitable conductor 30 extends from the binding postmarked Set to the antenna binding post of the radio receiver 31. Antennae 32 and 33 are connected by leads 34 and 35 respectively to binding posts marked 1st ant. and 2nd ant. respectively. The binding post marked Grid. is connected to the ground by means of a conductor 36. Some receiving sets are operated from a long and ashort antenna in order to obtain the largest range from the radio receiving set. Antenna 32 may be used as the long antenna and antenna 33 as the short antenna. When it is desired to receive radio signals over the long antenna the rotary member 11 of the switch is positioned so that the conductor switch 29 engages the contacts 16 associated with the binding posts marked Set and 1st ant. WVhen the rotary member 11 is positioned as above described the contacts 16 associated with the binding posts marked 2nd ant. and Gnd. are open. When the receiving set 31 is not in use the switch movable member 11 is moved to the position shown in Fig. 2 so that the conductor strip 29 engages the contacts 16 associated with the binding posts marked 1st. ant., 2nd ant., and Grid. lVith the switch in this position lightning or the like that may strike either or both of the antennae is conducted to the ground without damaging the set.

It should be noted that this switch may be mounted adjacent to the radio set without detracting from the appearance of the set, or

it may be mounted on the window sill nearest the radio set, or in any other convenient place. While the switch has been described as used with a radio receiving set it is under- 5 stood that the same may also be used with sending sets. Further it should be noted that the stationary member or base and the rotary member 11 are made of insulating material, such as rubber or the like. 10 What is claimed is:

1. A switch comprising a base and a rotary member, the base comprising a ring, a center hub, arms having one of their ends secured to the ring and their other ends secured to 15 the hub, the base being provided with openings betweenadjacent-arms, contacts secured to the ring and extending through the openings, the rotary member being cup shaped and rotatably mounted on the hub, flanges v39 carried by the rotary member, and conductor V strip carried by the flanges and adapted to selectively engage two or more of the contacts.

2. A switch comprising a base having openings therein, a plurality of contacts carried by the base and extending through the openings, a rotary member rotatably inc-unted on the base, flanges carried by the rotary member and a conductor strip secured to the flanges adapted to engage two or more of the contacts.

3. A switch comprising a base, the base comprising a ring, a center hub, arms having their one end secured to the'ring and their other end secured to the hub, the base being provided with openings between ad jacent arms, contacts carried by the ring and extending through the openings, and means rotatably mounted on the base adapted to se- 4O lectively contact two or more contacts.

V In testimony whereof, I have hereunto subscribed by name this 10th day of November,

JOSEPH E. Elsi-1E3. 

